Separable electric plug



Nov. 27, 1951 A, DENINE 2,576,174

SEPARABLE ELECTRIC PLUG Original F'iled March 25, 1940 2 SHEETS-SHEET 1 .9 INVENTOR.

ATTORNEYS.

Nov. 27, 1951 M A. DENINE 2,576,174

SEPARABLE ELECTRIC PLUG Original Filed March 25, 1940 2 SHEETSSHEET 2 .9 I I a jmfllleizz'lze 6 I M J INVENTOR. k /7 BY 7 /6 ATTORNEYS UNITED STATES OFFICE I sEPAieABLE elmo'rmcrnue. Martin A'. Denine, deceased; lateoi LosiA h geles, Califl, byJamesBruce Denin'e, administrator;

Los Angeles; Calif., assignor; by decreeof distribution, to JamesBruceDenine l Substitutedv for abandoned-application SerialNoi. 325,886; March 25, 1940. .This application. ctober 27', 1950, SerialNo; 192.,4 24

2 Claims. (01. rush-3st.)

This invention relates to separable electric plugs designed for use in connecting electric wires, the primary object of the invention being to provide an electric plug and socket wherein the contacts are so insulated with'respect to each other, thatall possibilities of shortingthe circuit, are eliminated. v i l Ari-important object of the invention .isto pro videa separableplug having means'to insure the proper positioning of the plug in its socket.

A further object of the invention is to provide aseparable plug wherein the wires areco'nnected thereto in such away that the straindirected to the wires during; the removal of the plugfrom its socket, will be directed to the bodyportion of the plug and not to the connection betweentheelectric wires and contacts of the plug.

With the foregoing and other objects in view, which will appear as the description proceeds, the invention resides in the combination and arrangement of parts and in the details of construction hereinafter described and claimed, it being understood that changes in the precise embodiment of the invention herein described, may be made within the scope of what is claimed, without departing from the spirit of the inven' tion.

Referring to the drawing:

Figure 1 is a plan view of a separable plug and socket, constructed in accordance with the invention.

Figure 2 is an elevational view of the plug.

Figure 3 is a sectional view taken on line 3-3 of Figure 2.

Figure 4 is a sectional view taken on line 4-4 of Figure 2.

Figure 5 is a longitudinal sectional view through the socket member.

Figure 6 is a sectional view taken on line 6-4; of Figure 5.

Figure 7 is a sectional view through the socket member, illustrating a plug as positioned therein, the view being taken at right angles to Figure 6.

Referring to the drawings in detail, the reference character 5 designates a socket member which is of the multiple type, the socket member 5 having openings or sockets to receive the usual male members, forming a part of separable plugs designed for electrically connecting wires of a circuit.

Each socket member is formed with a lateral member 6 that is in communication with the main portion of the socket, through the slot 1. Arranged within the lateral chamber of each socket, is a contact member 8 adapted to be engaged by the; contact member 9 whichextends longitudinally of the stenr It 01 the plugassociated with thesocket member, the plugin the presentshowing being indicated at" H. The contact bar indi cated at i2" is secured within the socket member and has connection with the contact member 8' as clearlyshcwn by Figure '7 of'the draw-ings.

Disposedadiacent to the bottomof the socket member and arranged in direct line with the stem iii ofthe-plug inserted within the-socket member; is a contact member lt which is formed at oneendof the contact bar 44, the contact'bars 52- and 14 having means whereby the wires 15 forming a partof the circuit in which the separable plug is positioned,-areconnected.

Spring fingers indicated at [6'- are-connected with the contact'bar l4, and are provided with enlargements adapted to engage within the groove l1 formed on the inner end of the stem [0 of the plug, to the end that the plug will be securely held within the socket member, when positioned to complete a circuit through the plug.

The plug comprises a hollow body portion indicated at l8 from which the stem H) extends, the body portion being formed with a dividing rib [9 formed with an opening to receive the bolt 20.

A groove 2| is formed adjacent to the edge of the body portion, and is designed to accommodate the rib 22 carried by the cover 23, which is held in position by the bolt 20, which is shown as extended through an opening formed in the cover. The reference character 24 designates a contact member which is embedded in the body portion, the contact member extending through the cen tral portion of the stem, the lower end thereof providing a contact to be engaged by the contact member at the end of the contact bar M. The contact member 9 is also embedded in the body portion and disposed on the opposite side of the dividing rib l9, so that the wires which are connected to the contact members 9 and 24 will be held in spaced relation with respect to each other, and insulated from each other, as clearly shown by Figure 2 of the drawings. Stamped from each of the contacts 9 and 24, is a. finger 25 along which the wires, which are indicated at 26, and which provide the extension wires of a circuit, are wrapped, securing the wires to the contact members 9 and 24.

Directly above the contact fingers 25 are openings 21, and directly above the openings 21 are roughened portions 28 against which the exposed ends of the wires 26 are forced, portions of the wires being forced into openings 21, as shown by Figure 4 of the drawings.

Positioned within the hollow body portion, is an insulating plug 29 which is formed with enlargements 29' that fall opposite to the openings 21, when the insulating plug has been positioned, and force the wires into said openings. The enlargements engage the wires which are secured to the contact members, forcing portions of the awarm wires into the openings to further lock the wires to the contact members. As shown by Figure! of the drawings, the upper portions of these in sulating plugs overlie the upper ends of the contact members, bending therwires positioned over the upper ends of the contact members, thelex treme upper ends of the insulating plugs biting against the insulation of the wires, at points just below the inner surface of the upper end of the body portion 3 tightly gripping the wires. Thus it will be seen that due to this construction, any strain directed to the wires and plug caused by.

a person pulling the wires to remove the plug from its socket, will be concentrated at the point of contact between the upper end of the insulating plug and wires, thereby relieving the contact fingers of the strain which would under normal conditions, pull the wires from the contact memhers.

From the foregoing it will be seen that due to the construction shown and described, he has provided a separable electric plug wherein the plug section thereof will be properly positioned within the socket, and the wires connected with the plug will be so arranged that the strain directed to the wires will be transferred from the point of contact between the wires and contact members, to the body portion of the plug, relievingthe connection of this undue strain which, would normally tend to pull the wires from their contact members.

What is claimed is:

l. A separable electric plug including a hollow body portion, a stem extending from the body portion, contact members extending along the stem, said contact members extending into the hollow body portion, contact fingers, extending from the contact members and around which 3 wires of an electric circuit are twisted, said contact members having openings adjacent to said contact fingers, a removable cover for said body portion, and an insulating plug held in position 7 between the cover and contact members, and

said insulating plug adapted to force portions of said electric wires into said openings, securing the wires against movement with respect to the contact members.

2. A separable electric plug including a hollow body portion, a stem extending from the hollow body-portion, contact members extending along JAMES BRUCE DENINE, Executor of the Estate of Martin A. Dem'ne, Deceased.

No references cited. 

